The CD4013B dual D flip-flop is a monolithic complementary MOS (CMOS) integrated circuit constructed with N- and P-channel enhancement mode transistors Each flip-flop has independent data set reset and clock inputs and ``Q'' and ``Q'' outputs These devices can be used for shift register applications and by connecting ``Q'' output to the data input for counter and toggle applications The logic level present at the ``D'' input is transferred to the Q output during the positive-going transition of the clock pulse Setting or resetting is independent of the clock and is accomplished by a high level on the set or reset line respectively